Wedlug w3c istnieje 3rd edition (rok 2004) ktora zastepuje oryginalna wersje 1.0. Poza tym jest jeszcze wersja 1.1 chociarz byc moze ta sie jeszcze nie uzywa powszechnie

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"Extensible Markup Language (XML) 1.0 (Third Edition)
Extensible Markup Language (XML) 1.0 (Third Edition) W3C Recommendation 4th February 2004, François Yergeau, Tim Bray, Jean Paoli, C. M. Sperberg-McQueen, Eve Maler
There is also a page for errata.
The Third Edition supersedes the original XML 1.0 Recommendation published on 10th February 1998.
Extensible Markup Language (XML) 1.1
XML 1.1, W3C Recommendation, 4th February 2004, François Yergeau, John Cowan, Tim Bray, Jean Paoli, C. M. Sperberg-McQueen, Eve Maler. (edited in place 15 April 2004)
There is also a page for errata.
XML 1.1 updates XML so that it no longer depends on the specific Unicode version: you can always use the latest. It also adds checking of normalization, and follows the Unicode line ending rules more closely.
You are encouraged to create or generate XML 1.0 documents if you do not need the new features in XML 1.1; XML Parsers are expected to understand both XML 1.0 and XML 1.1."
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